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EP0068081B1 - Hall element device - Google Patents

Hall element device Download PDF

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Publication number
EP0068081B1
EP0068081B1 EP82102690A EP82102690A EP0068081B1 EP 0068081 B1 EP0068081 B1 EP 0068081B1 EP 82102690 A EP82102690 A EP 82102690A EP 82102690 A EP82102690 A EP 82102690A EP 0068081 B1 EP0068081 B1 EP 0068081B1
Authority
EP
European Patent Office
Prior art keywords
hall element
output
input
hall
operational amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82102690A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0068081A1 (en
Inventor
Shikei Tanaka
Kunihiko Matsui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP0068081A1 publication Critical patent/EP0068081A1/en
Application granted granted Critical
Publication of EP0068081B1 publication Critical patent/EP0068081B1/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/08—Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N52/00—Hall-effect devices

Definitions

  • This invention relates to a device which comprises a plurality of Hall elements and is designed to determine the sum of, or the difference between, the voltages between all of the adjacent Hall elements.
  • Fig. 1 shows the arrangement of a conventional Hall element device comprising two Hall elements H1 and H2.
  • One Hall element H1 comprises a first control current-supplying terminal CT11, a second control current-supplying terminal CT12, a first output terminal OT11 and a second output terminal OT12.
  • the other Hall element H2 comprises a first control current-supplying terminal CT21, a second control current-supplying terminal CT22, a first output terminal OT21 and a second output terminal OT22.
  • the first control current-supplying terminal CT11 of the Hall element H1 and the first control current-supplying terminal CT21 of the Hall element H2 are connected to a common power source PS through the corresponding constant current sources 11 and 12.
  • the second control current-supplying terminals CT12 and CT22 of the respective Hall elements H1 and H2 are grounded.
  • the second output terminal OT12 of the first Hall element H1 and the first output terminal OT21 of the second Hall element H2 are connected together by a resistor R.
  • a Hall voltage Vh is produced across the first output terminal OT11 of the first Hall element H1 and the second output terminal OT22 of the second Hall element H2.
  • a Hall element of Fig. 2 has already been disclosed to eliminate the above-mentioned drawback.
  • a first Hall element H1 is provided with an independent power source PS1
  • a second Hall element is similarly provided with an independent power source PS2.
  • the second output terminal OT12 of the first Hall element H1 and the first output terminal OT21 of the second Hall element H2 are directly connected together.
  • the provision of electrically isolated power sources PS1 and PS2 for the first and second Hall elements H1 and H2, respectively complicates the arrangement of a resultant Hall element device and is uneconomical.
  • the provision of such isolated power sources PS1 and PS2 is accompanied with the drawback that noise readily occurs due to a parasitic capacity being produced across the power sources PS1 and PS2.
  • this invention provides a Hall element device which comprises a plurality of Hall elements including a first and last Hall element, each said Hall element including a first input, a second input, a first output and a second output; control current means, electrically connected to each said first input, for driving each said Hall element; and means, electrically connected between adjacent Hall elements, for maintaining said second output of the one adjacent Hall element and the first output of the other adjacent Hall element at the same potential and for preventing current from passing across the adjacent Hall elements, said means including a first input electrically connected to said second output of one said adjacent Hall element, a second input electrically connected to said first output of the other adjacent Hall element, and an output electrically connected to said second input of the other adjacent Hall element.
  • the output terminals of a plurality of Hall elements constituting the device are connected together by the high input impedance of the corresponding operational amplifiers. Further, an output from the operational amplifier is negatively fed back to the corresponding Hall element. Therefore, the output terminals of all the adjacent Hall elements are always retained at the same potential, thereby making it possible to determine a sum of, or the difference between, the voltages of all the adjacent Hall elements with high precision. As compared with the conventional Hall element device using a fully independent power source for each Hall element, the Hall element device of this invention is less expensive and more effectively suppresses noise.
  • the Hall element device of Fig. 3 comprises two Hall elements H1 and H2, two constant current sources 11 and 12 and an operational amplifier OA.
  • the Hall element H1 is provided with a first control current-supplying terminal CT11, a second control current-supplying terminal CT12, a first output terminal OT11 and a second output terminal OT12.
  • the Hall element H2 is provided with a first control current-supplying terminal CT21, a second control current-supplying terminal CT22, a first output terminal OT21 and a second output terminal OT22.
  • the first control current-supplying terminal CT11 of the first Hall element H1, and the first control current-supplying terminal CT21 of the second Hall element H2 are connected to a common power source PS through the corresponding constant current sources 11 and 12.
  • the second output terminal OT12 of the first Hall element H1 is connected to the noninverted input terminal of the operational amplifier OA.
  • the first output terminal OT21 of the second Hall element H2 is connected to the inverted input terminal of the operational amplifier OA.
  • the output terminal of the operational amplifier OA is connected to the second control current-supplying terminal CT22 of the second Hall element H2.
  • the second control current-supplying terminal CT12 of the first Hall element H1 is grounded.
  • An output Hall voltage Vh resulting from the sum of, or the difference between, the voltages of the adjacent first and second Hall elements H1 and H2 is produced across the first output terminal OT11 of the first Hall element H1 and the second output terminal OT22 of the second Hall element H2.
  • the operational amplifier OA has a fully higher input impedance than the internal resistance of the first and second Hall elements H1 and H2, causing the second output terminal OT12 of the first Hall element H1 to be connected to the first output terminal OT21 of the second Hall element H2 through a high impedance.
  • the first output terminal OT21 of the second Hall element H2 is connected to the inverted input terminal of the operational amplifier OA.
  • the output terminal of the operational amplifier OA is connected to the second control current-supplying terminal CT22 of the second Hall element H2, thereby constituting a negative feedback loop.
  • the Hall element device of Fig. 3 With the Hall element device of Fig. 3 according to the first embodiment of this invention, no current passes across the connected Hall elements as is the case with the conventional Hall element device of Fig. 1, thereby enabling measurement to be made with high precision without errors. Further, the Hall element device of this invention is not provided with electrically isolated power sources as is the case with another conventional Hall element device of Fig. 2. Therefore, the Hall element device of the invention offers the advantages that the Hall element device as a whole is simplified in arrangement and reduced in cost; no noise results from the parasitic capacity across the power source; and since the output terminals of the first and second Hall elements H1 and H2 are kept at the same potential, unbalanced voltage occurring between the first and second Hall elements H1 and H2 can be compensated by adjusting the control current.
  • a constant current source acting as a type of voltage-current conversion unit is applied to supply power to the first and second Hall elements H1 and H2.
  • the level of the output voltage for each Hall element varies with the intensity of a magnetic field applied to the Hall elements H1 and H2.
  • a Hall element device according to the second embodiment of this invention.
  • an n number of Hall elements H1, ... Hk-1, Hk, ..., Hn are used.
  • An operational amplifier OAk-1 is set between Hall elements Hk-1, Hk.
  • the noninverted input terminal of the operational amplifier OAk-1 is connected to the second output terminal OTk-1,2 of the Hall element Hk-1.
  • the inverted input terminal of the operational amplifier OAk-1 is connected to the first output terminal OTk,1 of the Hall element Hk.
  • the output terminal of the operational amplifier OAk-1 is connected to the second control current-supplying terminal OTk,1 of the Hall element Hk.
  • the second control current-supplying terminal CT12 of the first Hall element H1 is grounded.
  • a voltage Vh representing the sum of, or difference between, the voltages between all of the adjacent Hall elements H1 to Hn is produced between the first output terminal OT11 of the first Hall element H and the second output terminal OTn2 of the Hall element Hn having an n order.
  • a first voltage-current converter VIC1 supplies the first control current-supplying terminal CT11 of the first Hall element H1 with a control current proportional to a load voltage V(P1-P2) across the terminals P1 and P2.
  • a second voltage-current converter VIC2 supplies the first control current-supplying terminal CT21 of the second Hall element H2 with a control current proportional to a load voltage V(P3-P2) impressed between the terminals P3 and P2.
  • the voltage-current converter VIC1 comprises an operational amplifier OA11 and a load resistor R1.
  • the voltage-current converter VIC2 comprises an operational amplifier OA22 and a load resistor R2.
  • the voltage-current converter VIC1 supplies the Hall element H1 with a current proportional to a voltage impressed on the operational amplifier OA1.
  • the voltage-current converter VIC2 supplies the Hall element H2 with a current proportional to a voltage impressed on the operational amplifier OA2.
  • a magnet M1 supplies the first Hall element H1 with a magnetic field proportional to a load current I(1S-1L) running across the terminals 1S and 1L.
  • a magnet M2 supplies the second Hall element with a magnetic field proportional to a load current 1(3S-3L) flowing across the terminals 3S and 3L.
  • the second control current supplying terminal CT12 of the first Hall element H1 is grounded.
  • the second output terminal OT12 of the first Hall element H1 is connected to the noninverted input terminal of the operational amplifier OA.
  • the first output terminal OT21 of the second Hall element H2 is connected to the inverted input terminal of the operational amplifier OA.
  • the second control current-supplying terminal CT22 of the second Hall element H2 is connected to the output terminal of the operational amplifier OA.
  • the first output terminal OT11 of the first Hall element H1 and the second output terminal OT22 of the second Hall element H2 are connected to a detection circuit DC.
  • the detection circuit DC comprises operational amplifiers OA33 and OA44, resistors R3 to R7, and capacitor C, and can measure the Hall voltage Vh without being affected by the Hall resistance of the Hall element.
  • the detection circuit DC sends forth a voltage Vout proportional to the power consumed.
  • the above-mentioned 3-phase wattmeter using a Hall element device embodying this invention, can measure power consumption with high precision and is affected very little by noise because of the simple circuit arrangement.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Magnetic Variables (AREA)
  • Hall/Mr Elements (AREA)
EP82102690A 1981-06-26 1982-03-30 Hall element device Expired EP0068081B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP56099354A JPS582084A (ja) 1981-06-26 1981-06-26 ホ−ル素子装置
JP99354/81 1981-06-26

Publications (2)

Publication Number Publication Date
EP0068081A1 EP0068081A1 (en) 1983-01-05
EP0068081B1 true EP0068081B1 (en) 1985-07-10

Family

ID=14245260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102690A Expired EP0068081B1 (en) 1981-06-26 1982-03-30 Hall element device

Country Status (4)

Country Link
US (1) US4464629A (ja)
EP (1) EP0068081B1 (ja)
JP (1) JPS582084A (ja)
DE (1) DE3264636D1 (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61194885A (ja) * 1985-02-25 1986-08-29 Seiko Instr & Electronics Ltd 磁気センサ
JPS62206889A (ja) * 1986-03-07 1987-09-11 Seiko Instr & Electronics Ltd 磁気センサ
CH669068A5 (de) * 1986-04-29 1989-02-15 Landis & Gyr Ag Integrierbares hallelement.
JP2614444B2 (ja) * 1987-03-02 1997-05-28 セイコー電子工業株式会社 磁気センサ
CH677036A5 (ja) * 1987-08-06 1991-03-28 Landis & Gyr Betriebs Ag
JP2796391B2 (ja) * 1990-01-08 1998-09-10 株式会社日立製作所 物理量検出方法および物理量検出装置あるいはこれらの方法あるいは装置を利用したサーボモータおよびこのサーボモータを使用したパワーステアリング装置
JP3002310B2 (ja) * 1991-11-21 2000-01-24 株式会社東芝 電力量計
US5831426A (en) 1996-08-16 1998-11-03 Nonvolatile Electronics, Incorporated Magnetic current sensor
US6466004B1 (en) 2000-04-27 2002-10-15 Sensotec, Inc. Apparatus and method for measuring weld circuit
FR2820211A1 (fr) * 2001-02-01 2002-08-02 Schlumberger Ind Sa Cellule a effet hall pour la mesure de courant efficace
US7557562B2 (en) * 2004-09-17 2009-07-07 Nve Corporation Inverted magnetic isolator
US7847536B2 (en) * 2006-08-31 2010-12-07 Itron, Inc. Hall sensor with temperature drift control
JP2015078949A (ja) * 2013-10-18 2015-04-23 旭化成エレクトロニクス株式会社 ホール起電力信号検出回路
JP2017161475A (ja) * 2016-03-11 2017-09-14 株式会社東芝 半導体装置および磁気センサ
CN107478887A (zh) * 2017-07-07 2017-12-15 中国电力科学研究院 一种阵列式霍尔电流传感器
JP7239308B2 (ja) * 2018-03-14 2023-03-14 エイブリック株式会社 半導体装置及びその調整方法
US11567107B2 (en) * 2020-12-31 2023-01-31 Texas Instruments Incorporated Differential hall sensor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988650A (en) * 1953-11-11 1961-06-13 Siemens Ag Hall-effect control element with utilization circuit
GB822210A (en) * 1957-03-29 1959-10-21 Gen Electric Co Ltd Improvements in or relating to instruments for making magnetic measurements
GB868765A (en) * 1957-07-16 1961-05-25 Siemens Ag Improvements in or relating to apparatus for the measurement of magnetic field gradients
DE1295073B (de) * 1962-10-31 1969-05-14 Siemens Ag Elektronischer Wirkverbrauchszaehler
GB1594959A (en) * 1977-03-18 1981-08-05 Tokyo Shibaura Electric Co Multiplier using hall element

Also Published As

Publication number Publication date
EP0068081A1 (en) 1983-01-05
US4464629A (en) 1984-08-07
DE3264636D1 (en) 1985-08-14
JPS634717B2 (ja) 1988-01-30
JPS582084A (ja) 1983-01-07

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